ST. LOUIS COUNTY – One person was shot by police overnight, not far from the unrest that unfolded for the third night in Ferguson.

The shooting happened just before 1 a.m. Wednesday at Chambers Road and Sheffingdell Court in unincorporated St. Louis County.

St. Louis County police say they responded to a report about four masked men carrying shotguns in the area. The caller said the suspects had fired shots.

When police arrived at the scene they saw the men running. One officer "came into contact" with a suspect, who turned and pointed a handgun at the officer.

A police officer fired at least once at the suspect, wounding him. He was taken to an area hospital in critical condition.

The shooting happened about two blocks from St. Mark Family Church, where the Rev. Al Sharpton held a gathering Tuesday night, uniting the community, which is outraged over 18-year-old Michael Brown's shooting death Saturday afternoon.

A mile away and an hour earlier, a woman was shot in the head while walking outside. Police say it's "unlikely" the two shootings are related.

About a mile away, protests erupted for the third night in a row in Ferguson. Tuesday night's protests began peacefully but ended with police once again firing tear gas into the crowd. Police said they were responding to protesters who had thrown bottles at officers, according to CNN.

St. Louis County Police stand guard at a QuikTrip Gas station following a night of looting, rioting and arsons in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. (Photo: BILL GREENBLATT, UPI)

Volunteers clean up debris on the parking lot of a QuikTrip gas station after demonstrators looted and set fire to the building when a candlelight vigil became violent in Ferguson, Missouri on August 11, 2014. People are protesting the police shooting of the unarmed black teenager Michael Brown on August 9, 2014. (Photo: BILL GREENBLATT UPI)

St. Louis County Police stand guard over a QuickTrip Gas staton that was burned, while a ATM machine lays in the parking lot following a night of looting, rioting and arsons in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. (Photo: BILL GREENBLATT UPI)

St. Louis County Police stand guard as firefighters return to the QuikTrip Gas station to put out hot spots following a night of looting, rioting and arsons in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. (Photo: BILL GREENBLATT, UPI)

Workers at the Dollar General Store put merchandise back on the shelves as large pieces of broken glass remain in place following a night of looting, rioting and arsons in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. (Photo: BILL GREENBLATT UPI)

Workers board up businesses that were vandaliized after a night of rioting in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. (Photo: BILL GREENBLATT, UPI)

Firefighters and police remain at the scene of the burnt out QuikTrip Gas station following a night of looting, rioting and arsons in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. UPI/Bill Greenblatt (Photo: BILL GREENBLATT UPI)

The windows at the Northland Chop Suey are shattered as traffic drives by following a night of looting, rioting and arsons in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. UPI/Bill Greenblatt (Photo: BILL GREENBLATT UPI)

Sightseers get a closer look at a QuikTrip Gas station following a night of looting, rioting and arsons in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. UPI/Bill Greenblatt (Photo: BILL GREENBLATT UPI)

Protesters are greeted by a wall of police officers after a march to the Ferguson Police department in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. UPI/Bill Greenblatt (Photo: BILL GREENBLATT UPI)

Members of the St. Louis County Police Department remain on the lot of the QuikTrip Gas station in Ferguson, Missouri on August 11, 2014. People are upset because of the Ferguson Police shooting and death of an unarmed black teenager Michael Brown on August 9, 2014. In all about 20 businesses sustained damage after a candlelight vigil turned violent. UPI/Bill Greenblatt (Photo: BILL GREENBLATT UPI)

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Authorities on Tuesday delayed revealing the identity of the police officer who fatally shot an unarmed teen three days ago, citing threats against the officer on social media.

"If we come out and say, 'it was this officer,' then he immediately becomes a target," Ferguson Police Chief Thomas Jackson said. "We're taking the threats seriously."

Jackson, who had said he would reveal the officer's name Tuesday, said there is now no timetable.

Tuesday evening he said the officer has been on the force for about six years and had come across 18-year-old Michael Brown Jr.

and a friend walking in the street. The youths were black and witnesses said the officer was white.

Jackson said all but three of the police department's 53 officers are white.

Police have said that after the officer asked the teens to move, a scuffle occurred. Witnesses say Brown had raised his hands to surrender when the shots were fired. Police have not confirmed that information.

A second witness has told the St. Louis NAACP that Brown did not struggle with the officer inside his patrol car, where the fatal shots were fired. The unidentified person will be interviewed by FBI.